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Old thorn thyristors

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Joined: Sat Nov 22, 2014 9:43 pm

Old thorn thyristors

Post by Rebel Rafter » Sun Nov 15, 2015 7:03 pm

Hi, folks, RR here. Does anyone have any info on these two thyristors which if I remember right were once used on some early Thorn colour chassis. Types SCR957 and MCR220-7. I can't find them in my Jaeger book and I can't find anything helpful online either. Thanks in advance, RR.

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Location: Willington, Co Durham.

Re: Old thorn thyristors

Post by malcscott » Sun Nov 15, 2015 7:21 pm

The SCR957 was used in the Brc 300/3500 psu as a crowbar thyristor. It replaced the Brc 4443 type. Got some in stock, Malc.

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Re: Old thorn thyristors

Post by crustytv » Sun Nov 15, 2015 8:31 pm

500V, 6,5A(Tc=75°C), Igt/Ih<10/<50mA

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